Swaging press



Alg. 2e, 1924-. l 1,506,124

J. HUBSCH SWAGING PRESS Filed April 18,. 1922 INVENT 'R f Patented Aug. 26, 1924.

UNITED STATES PATENT OFFICE.

SWAGING PRESS.

Application filed April 18,

To @ZZ whom t may concern.'

Be it known that I, JOHN HUBsoH, a citizen .of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Swaging Presses; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to a swaging press, and more particularly to one adapted for use in dentistry, and in the making of plates, crowns, and other parts.

In the accompanying drawing Fig. 1 is a vertical section of my improved swaging press showing the plunger ready to be lowered; Fig. 2 is a cross section on the line 2-2 Fig. 1.

The numeral 2 designates a suitable base with the uprights 3 secured thereto, said uprights being connected at their upper end by the cross piece 4 with the central hubportion 5 having the opening 6 formed therein. A hollow screw-bar 7 has connected to its upper end a suitable hand-wheel for the turning of said bar. The screw-bar 7 passes down through the opening G in the hub-portion 5 of the cross piece 4, and engages the nut 8 which is normally held up in engagement with the shoulder 9 in the hub-portion 5. The nut 8 has the grooves 10 to receive the screw 11 passing through the downwardly extending iiange 12 of the cross piece 4. The stop plate 13 is connected with the flange 12, regulating the downward movement of the nut 8.

lVithin the screw-bar 7 is the spindle 1'l which is screwed at its lower end into tl collar 15 below the collar 16 on the screwbar 7 In swaging a gold crown with my improved machine the container-mold 16 is placed on the plate 2, and within said container-mold is the mold 17 formed of a metal of low fusible quality, said mold being made in two sections divided by the line 1S. The mold cavity 19 corresponds to the shape to be given to the metal, and this metal, in the form of a cartridge 20, is placed in the mold cavity 19, said cartridge being partly filled with wax 21.

rPhe plunger 22, usually formed of gutta- 1922. Serial No. 555,534.

percha, is inserted in the cartridge 20, whereupon by turning the hand-wheel the screw-bar 7 is lowered a certain amount, l

forcing down with it the collar 15. In this manner the plunger 22 is forced down into the cartridge 20, and the wax being compressed will. force the metal out into the mold-cavity. After the screw-bar has been lowered to a certain extent the operator strikes the upper end of the spindle 14 several times which forces the said spindle down bringing the collar 15 to the position indicated in the dotted lines Fig. 1. The screw-bar 7 which is unsupported will drop of its own weight until its collar 16 engages the collar 15, the nut 8 leaving the shoulder 9 the corresponding distance. By turning the screw-bar 7, the nut 8 will be driven up against the shoulder 9, to hold the screwbar in this position.

By the above apparatus the screw-bar follows up the movement of the spindle automatically.

`What I claim is:

1. In a swaging press, the combination of a suitable frame having a cross-member, a hollow screw-bar mounted therein, passing through an opening in said cross-member, a nut below cross-member, and adapted to engage the lower face of same, said screw-bar engaging said nut, means for holding said nut against rotation, a compressor-plate adapted to be engaged by said screw-bar, and a spindle in the said screw-bar connected to said compressor-plate and extending above said screw-bar.

2. In a swaging press, the combination of a suitable frame, a hollow screw-bar mounted therein, passing through the opening in the said cross-member, a nut below said crossmember adapted to engage the lower face of said cross member, said screw-bar engaging said nut, means for holding said nut against rotation, a stop in the path of said nut, a compressor-plate adapted to be engaged by said screw-bar, and spindle in said screwbar connected to said plate and extending above said screw-bar.

In testimony whereof I, the said JOHN I-IUBsoH, have hereunto set my hand.

JOHN HUBSCH. 

